Aharonov-Bohm phase operations on a double-barrier nanoring charge qubit

Details Aharonov-Bohm phase operations on a double-barrier nanoring charge qubit Aharonov-Bohm phase operations on a double-barrier nanoring charge qubit

2006-04-07

arxiv.org/abs/cond-mat/0604195v3

Phys. Rev. B 74, 035432 (2006)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

6 pages, 7 figures

Scientific paper

10.1103/PhysRevB.74.035432

We present a scheme for charge qubit implementation in a double-barrier nanoring. The logical states of the qubit are encoded in the spatial wavefunctions of the two lowest energy states of the system. The Aharonov-Bohm phase introduced by magnetic flux, instead of tunable tunnelings, along with electric fields can be used for implementing the quantum gate operations. During the operations, the external fields should be switched smoothly enough to avoid the errors caused by the transition to higher-lying states. The structure and field effects on the validity of the qubit are also studied.

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